NovaBryan/EVE_Dump
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_endian.py (1361B)

      1 #Embedded file name: C:\BuildAgent\work\20d73f1b24eed06e\eve\release\V24.01\carbon\common\stdlib\ctypes\_endian.py
      2 import sys
      3 from ctypes import *
      4 _array_type = type(c_int * 3)
      5 
      6 def _other_endian(typ):
      7     try:
      8         return getattr(typ, _OTHER_ENDIAN)
      9     except AttributeError:
     10         if type(typ) == _array_type:
     11             return _other_endian(typ._type_) * typ._length_
     12         raise TypeError('This type does not support other endian: %s' % typ)
     13 
     14 
     15 class _swapped_meta(type(Structure)):
     16 
     17     def __setattr__(self, attrname, value):
     18         if attrname == '_fields_':
     19             fields = []
     20             for desc in value:
     21                 name = desc[0]
     22                 typ = desc[1]
     23                 rest = desc[2:]
     24                 fields.append((name, _other_endian(typ)) + rest)
     25 
     26             value = fields
     27         super(_swapped_meta, self).__setattr__(attrname, value)
     28 
     29 
     30 if sys.byteorder == 'little':
     31     _OTHER_ENDIAN = '__ctype_be__'
     32     LittleEndianStructure = Structure
     33 
     34     class BigEndianStructure(Structure):
     35         __metaclass__ = _swapped_meta
     36         _swappedbytes_ = None
     37 
     38 
     39 elif sys.byteorder == 'big':
     40     _OTHER_ENDIAN = '__ctype_le__'
     41     BigEndianStructure = Structure
     42 
     43     class LittleEndianStructure(Structure):
     44         __metaclass__ = _swapped_meta
     45         _swappedbytes_ = None
     46 
     47 
     48 else:
     49     raise RuntimeError('Invalid byteorder')